The First Convergent Synthesis of 23,23-Difluoro-25-hydroxyvitamin D3 and Its 24-Hydroxy Derivatives: Preliminary Assessment of Biological Activities
作者:Sayuri Mototani、Fumihiro Kawagoe、Kaori Yasuda、Hiroki Mano、Toshiyuki Sakaki、Atsushi Kittaka
DOI:10.3390/molecules27165352
日期:——
In this paper, we report an efficient synthetic route for the 23,23-difluoro-25-hydroxyvitamin D3 (5) and its 24-hydroxylated analogues (7,8), which are candidates for the CYP24A1 main metabolites of 5. The key fragments, 23,23-difluoro-CD-ring precursors (9–11), were synthesized starting from Inhoffen-Lythgoe diol (12), and introduction of the C23 difluoro unit to α-ketoester (19) was achieved using
在本文中,我们报告了 23,23-二氟-25-羟基维生素 D 3 ( 5 ) 及其 24-羟基化类似物 ( 7 , 8 ) 的有效合成路线,它们是 CYP24A1 主要代谢物5的候选物。从 Inhoffen-Lythgoe 二醇 (12) 开始合成关键片段 23,23-二氟-CD-环前体 (9-11) ,并使用N将C23二氟单元引入 α-酮酯 ( 19 ) , N-二乙氨基三氟化硫 (DAST)。初步生物学评价表明,23,23-F 2 -25(OH)D 3( 5 ) 与非氟化对应物 25(OH)D 3 ( 1 )相比,对 CYP24A1 代谢的抗性高约 8 倍,VDR 结合亲和力低 12 倍。